## **Core Concept**
The question tests knowledge of a specific syndrome characterized by a combination of symptoms including urethritis, arthritis, conjunctivitis, and oral ulcers. This syndrome is known as Reactive Arthritis (ReA), which is a form of seronegative spondyloarthritis.

## **Why the Correct Answer is Right**
Reactive Arthritis is a type of arthritis that occurs as a reaction to an infection elsewhere in the body, typically in the gastrointestinal tract or the urethra. The classic triad of symptoms originally described included urethritis, arthritis, and conjunctivitis. However, the presence of oral ulcers as part of the clinical picture, along with the other symptoms, completes a tetrad that can be seen in this condition. Reactive Arthritis is strongly associated with HLA-B27.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because it does not correspond to the correct answer based on the information provided about Reactive Arthritis.
- **Option B:** Similarly, this option does not match the clinical presentation described for Reactive Arthritis.
- **Option C:** Not applicable as the correct answer is provided.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Reactive Arthritis often follows a gastrointestinal or genitourinary infection, and it is strongly associated with HLA-B27. The classic tetrad of symptoms (urethritis, arthritis, conjunctivitis, and oral ulcers) helps in the diagnosis. A memorable point is that the condition is part of the spondyloarthritis group, which shares certain clinical and genetic features.

## **Correct Answer:** .